1 /*

     2  * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved.

     3  * Copyright 2008, 2009 Red Hat, Inc.

     4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     5  *

     6  * This code is free software; you can redistribute it and/or modify it

     7  * under the terms of the GNU General Public License version 2 only, as

     8  * published by the Free Software Foundation.

     9  *

    10  * This code is distributed in the hope that it will be useful, but WITHOUT

    11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    13  * version 2 for more details (a copy is included in the LICENSE file that

    14  * accompanied this code).

    15  *

    16  * You should have received a copy of the GNU General Public License version

    17  * 2 along with this work; if not, write to the Free Software Foundation,

    18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    19  *

    20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    21  * or visit www.oracle.com if you need additional information or have any

    22  * questions.

    23  *

    24  */

    25 

    26 class SharkContext;

    27 

    28 class SharkCompiler : public AbstractCompiler {

    29  public:

    30   // Creation

    31   SharkCompiler();

    32 

    33   // Name of this compiler

    34   const char *name()     { return "shark"; }

    35 

    36   // Missing feature tests

    37   bool supports_native() { return true; }

    38   bool supports_osr()    { return true; }

    39 

    40   // Customization

    41   bool needs_adapters()  { return false; }

    42   bool needs_stubs()     { return false; }

    43 

    44   // Initialization

    45   void initialize();

    46 

    47   // Compile a normal (bytecode) method and install it in the VM

    48   void compile_method(ciEnv* env, ciMethod* target, int entry_bci);

    49 

    50   // Generate a wrapper for a native (JNI) method

    51   nmethod* generate_native_wrapper(MacroAssembler* masm,

    52                                    methodHandle    target,

    53                                    BasicType*      arg_types,

    54                                    BasicType       return_type);

    55 

    56   // Free compiled methods (and native wrappers)

    57   void free_compiled_method(address code);

    58 

    59   // Each thread generating IR needs its own context.  The normal

    60   // context is used for bytecode methods, and is protected from

    61   // multiple simultaneous accesses by being restricted to the

    62   // compiler thread.  The native context is used for JNI methods,

    63   // and is protected from multiple simultaneous accesses by the

    64   // adapter handler library lock.

    65  private:

    66   SharkContext* _normal_context;

    67   SharkContext* _native_context;

    68 

    69  public:

    70   SharkContext* context() const {

    71     if (JavaThread::current()->is_Compiler_thread()) {

    72       return _normal_context;

    73     }

    74     else {

    75       assert(AdapterHandlerLibrary_lock->owned_by_self(), "should be");

    76       return _native_context;

    77     }

    78   }

    79 

    80   // The LLVM execution engine is the JIT we use to generate native

    81   // code.  It is thread safe, but we need to protect it with a lock

    82   // of our own because otherwise LLVM's lock and HotSpot's locks

    83   // interleave and deadlock.  The SharkMemoryManager is not thread

    84   // safe, and is protected by the same lock as the execution engine.

    85  private:

    86   Monitor*               _execution_engine_lock;

    87   SharkMemoryManager*    _memory_manager;

    88   llvm::ExecutionEngine* _execution_engine;

    89 

    90  private:

    91   Monitor* execution_engine_lock() const {

    92     return _execution_engine_lock;

    93   }

    94   SharkMemoryManager* memory_manager() const {

    95     assert(execution_engine_lock()->owned_by_self(), "should be");

    96     return _memory_manager;

    97   }

    98   llvm::ExecutionEngine* execution_engine() const {

    99     assert(execution_engine_lock()->owned_by_self(), "should be");

   100     return _execution_engine;

   101   }

   102 

   103   // Global access

   104  public:

   105   static SharkCompiler* compiler() {

   106     AbstractCompiler *compiler =

   107       CompileBroker::compiler(CompLevel_fast_compile);

   108     assert(compiler->is_shark() && compiler->is_initialized(), "should be");

   109     return (SharkCompiler *) compiler;

   110   }

   111 

   112   // Helpers

   113  private:

   114   static const char* methodname(const char* klass, const char* method);

   115   void generate_native_code(SharkEntry*     entry,

   116                             llvm::Function* function,

   117                             const char*     name);

   118   void free_queued_methods();

   119 };